| Abbreviation | Definition |
|---|---|
| LGV | Lavatory Galley Ventilation |
| LH | Left Hand |
| LIAC | Late Incoming AirCraft |
| LIAT | Languishing In Airport Terminals |
| LIAT | Leeward Islands Air Transport |
| LIH | Light Intensity High |
| Li-Ion | Lithium Ion |
| LJ | Locating Jig |
| LJLA | Liverpool John Lennon Airport |
| LL | aLL is weLL |
| LL | Lower Lobe |
| LLAT | Low Level Awareness Training |
| LLP | Life Limited Part |
| LMM | Line Maintenance Manager |
| LNAV | Lateral Navigation |
| LNIATA | Line Number Interchange Address Terminal Address |
| LOA | Letter Of Authorization |
| LOA | Limit Of Approach |
| LOB | Lancaster - Oslo - Bergen |
| LOC | Localizer |